升降机厂家http://www.jntr168.com/分析到在升降机的最顶部和最底部都设有一个传感器，该传感器用于检测其正前方的金属物体，借此检测升降机是否还处在导轨范围内，如果其中一个传感器没检测到导轨，则有控制系统切断电动升降机电源，避免升降机脱轨。
Lift manufacturers analysis to the topmost and bottommost lifts have a sensor that is used to detect metal objects in front, thereby detecting whether electric lift rail still is within range, if one of the sensors is not detected rail, there are electric lift off the power control system to avoid lift derailed.

升降机厂家http://www.jntr168.com/谈到升降机防脱轨装置，包括安装板和传感器，安装板固定在电动升降机吊笼或驱动装置上，传感器固定在安装板上，传感器的感应端正对电动升降机导轨架的金属构件，在升降机吊笼或驱动装置的顶部设置有一个安装板和传感器，在升降机吊笼的底部还设有一个安装板和传感器，该两个传感器的信号输出线均与控制装置相连，传感器是接近开关。
Speaking elevator lift anti-derailment device manufacturers, including the mounting plate and the sensor mounting plate on the lift cage or electric drives, sensor mounting plate, inductive sensors for electric lift upright metal frame rail components, electric lift cage or on top of the drive is provided with a mounting plate and the sensor at the bottom of the lift cage is also provided with a mounting plate and the sensor, the two sensor signal output lines are connected to the control unit, the sensor is a proximity switch.